/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlineUserCloudInterface.h
Delegate fired at intervals during a user file write to the network platform's storage
typedef TMulticastDelegate_ThreeParams< void, int32, const [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) &, const [FString](API\Runtime\Core\Containers\FString) & > FOnWriteUserFileProgress